YONKERS - Darel Reyes-Sanchez was wearing a child's life jacket when he went into the Hudson River on Monday, Yonkers police said.

It's unclear how the 31-year-old Bronx man was separated from the personal watercraft he was riding with a 23-year-old Bronx woman, but he died after apparently drowning near JFK Marina, police said.

Reyes-Sanchez was pronounced dead at a hospital after he ended up in the river and swallowed a lot of water, according to police, who are investigating the incident. He and the woman were both wearing life jackets that were too small for them, according to police, who said neither one of them appeared to be a swimmer.

Officers responded to the marina near Warburton Avenue around 6:45 p.m. for a report of a stranded personal watercraft and a missing person, police said.

The woman was able to float and make her way to shore and was found on an unoccupied boat moored at a local boat club, and was taken to a hospital for evaluation, police said. The man was found floating, unconscious, by the Westchester County police Marine Unit, police said.

Officers began CPR, and the man was taken to the hospital. Empress Ambulance also responded.